Django：使用 post_delete 信号时确定正在删除的用户

Question

我希望在删除某些对象时通知管理员，但我也想确定哪个用户正在执行删除。

有可能吗？

这是代码：

# models.py
# signal to notify admins when nodes are deleted
from django.db.models.signals import post_delete
from settings import DEBUG

def notify_on_delete(sender, instance, using, **kwargs):
    ''' Notify admins when nodes are deleted. Only for production use '''
    if DEBUG:
        #return False
        pass
    # prepare context
    context = {
        'node': instance,
        'site': SITE
    }
    # notify admins that want to receive notifications
    notify_admins(instance, 'email_notifications/node-deleted-admin_subject.txt', 'email_notifications/node-deleted-admin_body.txt', context, skip=False)

post_delete.connect(notify_on_delete, sender=Node)

Answer 1

我怀疑是否有可能使用内置信号（没有 User 隐式绑定到 delete 操作，并且由于 Django 的 loose coupling 数据库层不处理 HttpRequest 对象）。我会创建自己的信号，它提供一个user 参数，并在删除操作发生的任何视图中发送它，例如：

# myapp/signals.py
from django.dispatch import Signal
my_post_delete = Signal(providing_args=['instance', 'user'])

# myapp/models.py
from myapp.signals import my_post_delete
...
my_post_delete.connect(notify_on_delete, sender=Node)

# myapp/views.py
from myapp.signals import my_post_delete
...
@login_required
def my_delete_view(request, ...)
    ...
    instance = Node.objects.get(...)
    instance.delete()
    my_post_delete.send(sender=Node, instance=instance, user=request.user)